ttyslot - find entry of current user in utmp file

Syntax	#include <stdlib.h> int ttyslot (void);
Description	ttyslot() returns the index of the current user’s entry in the/var/adm/utmp file. The entry for the current user is an entry for which the utline structure element matches the name of a terminal in/dev that is linked to the standard input, standard output or error output (0, 1 or 2). The returned index is an integer which represents the record number of the entry in the /var/adm/utmp file. The index 0 is returned for the first record. ttyslot() is not thread-safe.
Return val.	Index of the entry
		if successful.
	-1	if an error occurred during the search for the terminal name, or if none of the file descriptors 0, 1 or 2 was assigned to a terminal.
Notes	ttyslot() will not be supported in the next version of the X/Open standard.
See also	endutxent(), ttyname(), stdlib.h.